WorksheetsGS7 Quiz 3
Total questions: 25
Worksheet time: 16mins
A ball falls freely from a height on Earth. What is its acceleration? Ignore air resistance. (no units)
(a)
A piece of cloth and a ball of same mass are dropped from a height. Which hits the ground first?
Ball
Cloth
Both will hit the ground at the same time
What is the SI unit of force?
kgms^-1
kgms^-2
kgm^2s^-1
kgm^2s^-2
An object has a mass of 0.1kg. Its weight on Mars is... (g=3.7ms^-2)
(a)
When speed increases, the air resistance acting on the object...
increases
decreases
no effect
When the exposed surface area of the object increases, the air resistance acting on the object
increases
decreases
no effect
When the mass of the object increases, the air resistance acting on the object...
increases
decreases
no effect
The substance that is dissolved in a solvent is called a...
(a)
Mixtures in which soluble particles are completely dissolved in a liquid or gas are called...
(a)
Solutions are...
homogenous
heterogenous
neither
Mixtures in which insoluble particles are suspended in a liquid or gas are called...
(a)
When suspensions are filtered, ... is left over.
(a)
Suspensions are...
homogenous
heterogenous
neither
25ml of water can dissolve 7g of salt A. What is the solubility of salt A in g/100ml? (no unit)
(a)
Humans have a...
single open circulatory system
single closed circulatory system
double open circulatory system
double closed circulatory system
Which blood vessels transport blood at high pressure?
arteries
capillaries
veins
venules
Which blood vessels have valves?
arteries
arterioles
capillaries
veins
White blood cells are also known as...
thrombocytes
erythrocytes
leukocytes
Which of these cells do not contain a nucleus?
bone marrow cells
red blood cells
white blood cells
skin cells
Which artery delivers deoxygenated (not rich in oxygen) blood?
pulmonary artery
aorta
renal artery
all arteries
Our respiratory system is adapted to use...
dirty and cold air
dirty and warm air
clean and cold air
clean and warm air
A bronchus branches out into many...
alveoli
trachea
bronchioles
pharynx
Mucus is secreted in our respiratory system to trap the following EXCEPT...
carbon dioxide molecules
dust
virus
bacteria
The air in the alveoli is supposed to have a .... than the blood circulating to the lungs.
higher O2 and lower CO2 concentration
higher O2 and CO2 concentration
lower O2 and higher CO2 concentration
lower O2 and CO2 concentration
The addictive compound in cigarettes is called...
tobacco
nicotine
tar
smoke
